Display panel or portion thereof with graphical user interface



FIG. 1 is a front view of a display panel or portion thereof with the graphical user interface showing a first embodiment of a design;

FIG. 2 is a front view of a display panel or portion thereof with the graphical user interface showing a second embodiment of the design; and,

FIG. 3 is a front view of a display panel or portion thereof with graphical user interface showing a third embodiment of the design.

The outermost broken lines depict a display panel or portion thereof that form no part of the claimed design. The remaining broken lines depicting portions of the graphical user interface are included for illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for a display panel or portion thereof with graphical user interface, as shown and described. 